This video will show you how to install Python 3 in a custom directory, configure PATH environment variable for Python 3 and PIP3 to work on Windows 10. It will also show you how to configure Python installation to support having multiple versions of Python on the same Windows machine.
This same process will apply for Python installation on other Windows versions.
Watch How to install Python 2 on Windows 10: • How to Install Python 2 on Windows 10